
Although
the proportions of a head will vary from person to person and
change slightly with age, there are some basic principles you
can follow to improve your drawing. You can use these to check
the general size, shape and position of features in your drawings.
If
you view a head from the front, its width is approximately two
thirds of its height.
If
you view a head from the side, its width is approximately seven
eighths of its height.
The
proportions of the head can be divided horizontally into four
equal quarters.
1.
The first quarter measures from the top of the head down to
the hairline.
2. The second quarter measures from the hairline down to the
eyes in the middle of the head.
3.
The third quarter contains most of the features. At the top
of this section the eyes
are usually level with the ears,
and at the bottom the nose
is roughly level with the ear lobes.
4. The final quarter stretches from the base of the nose to
the chin with the mouth
positioned just above the halfway mark.
These
proportions will only work if we share the same eye level as
the subject. They will become distorted if we view the head
from above or below.
Many
artists start a portrait with the eyes as they are the focal
point of any face. The following proportions should help you
with their scale and position in relation to the other features.
The
eyes are situated approximately half way down the head.
If
you view a head from the front, the distance across the eye
is similar to the distance between the eyes.
The distance between the eyes is similar to the breadth of the
nose.
As
you can see from the illustration above, these distances work
out at approximately one fifth of the width of the face.
Note
the position of the ear
in the profile view. It sits to the left hand side of the vertical
line which bisects the head.

If
you view a head from the front,
a triangle drawn from the centre of the head through either
side of the nose will establish a good proportion for the breadth
of the mouth.
If
you view it from the side, note how the eyes,
nose
and mouth
fit into a rectangle whose diagonal creates a good line to position
the corners of the nose and mouth.